under wraps
secret:
They tried to keep the report under wraps.

[TahlilGaran] Advanced Learner's Dictionary ▲

under wraps
secret.
The financial details of the case have been kept firmly under wraps.

The identity of the buyer is still under wraps.

[TahlilGaran] English Idioms Dictionary ▲

under wraps
not allowed to be seen until the right time, in secrecy
The new car was still under wraps when the car show started.

[TahlilGaran] English Idioms Dictionary ▲

under wraps
adv. or adj. phr. Not allowed to be seen until the right time; not allowed to act or speak freely; in secrecy; hidden.
■ Usually used with "keep".
We have a new player, hut we are keeping him under wraps until the game.
What the President is planning will be kept under wraps until tomorrow.
The spy was kept under wraps and not allowed to talk to newspapermen.
Compare: UNDER COVER.

[TahlilGaran] English Idioms Dictionary ▲